Canvas
Painting canvas is assessed for fiber, weave, tension, size and base layer; that combination influences brush feel and durability.
Cotton, linen and surface structure
Cotton is versatile and affordable, while linen is often stronger and more evenly woven. Fine weave supports detail and portrait work; a coarser structure remains visible in looser painting techniques. Check that the canvas for acrylic, oil or both is primed and that the wedges are positioned correctly.
Tension and preparation
A canvas should be flat and evenly stretched without twisting the wooden stretcher frame. Only add additional primer coats when material and desired absorption require it and sand safely between coats. Protect the back against moisture and pressure and lift large canvases by the stretcher frame, not by the canvas itself.
Also explore Painting Board · Easels · Paint for compatible materials and the next step in your project.